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Strangeness production in Pb-Pb collisions at 5.02TeV in ALICE

 Grant number: 16/13803-2 Support type: Regular Research Grants Duration: October 01, 2016 - September 30, 2018 Field of knowledge: Physical Sciences and Mathematics - Physics - Elementary Particle Physics and Fields Principal researcher: David Dobrigkeit Chinellato Grantee: David Dobrigkeit Chinellato Home Institution: Instituto de Física Gleb Wataghin (IFGW). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil

Abstract

Over the past few decades, ultra-relativistic heavy-ion collisions have been used to create high-energy-density systems in which it is believed that a deconfined state of partonic matter called the Quark-Gluon Plasma' (QGP) is formed. A number of characteristic features of such a state of matter, such as the baryon anomaly and strangeness enhancement, have been studied both at RHIC using gold-gold (Au-Au) collisions at 200 GeV and at the LHC using lead-lead (Pb-Pb) collisions at 2.76 TeV. Recently, the LHC has delivered Pb-Pb collisions at an unprecedented center-of-mass energy of 5.02 TeV. In this project, we propose to study the baryon anomaly and strangeness enhancement in Pb-Pb collisions at this higher energy. This will allow us to determine if the underlying mechanisms responsible for such phenomena are energy-density dependent, in which case these observations will exhibit $\sqrt{s}$ dependence, or if they are system-size dependent, in which case they will mostly remain unchanged as the colliding nuclei are still of the same dimensions. Furthermore, this project also proposes the continued maintenance, operation and development of an event selection and classification framework called `AliMultSelection'', which will be the tool to be used for any and all centrality and multiplicity selection performed in all colliding systems and is therefore fundamental not only for this project but for the ALICE experiment. (AU)